parallel.h

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#ifndef PARALLEL_H
#define PARALLEL_H
 
#include <blitz/array.h>
#include <mpi.h>
 
#include "parser.h"
 
class parallel {
    private:
        inline void assignRanks();
        void getNeighbours();
        void createComms();
 
    public:
        // ALL THE INTEGERS USED BELOW ARE POSITIVE. STILL IT IS BETTER TO USE int INSTEAD OF unsigned int
        int rank;
 
        int nProc;
 
        const int npX, npY;
 
        MPI_Comm MPI_ROW_COMM, MPI_COL_COMM;
 
        int xRank, yRank;
 
        blitz::Array<int, 1> faceRanks;
 
        blitz::Array<int, 1> edgeRanks;
 
        parallel(const parser &iDat);
 
        static inline int pmod(int a, int b) {return (a % b + b) % b;};
 
        inline int findRank(int xR, int yR) {return pmod(yR, npY)*npX + pmod(xR, npX);};
};
 
#endif